# Copyright 2023 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

# Check that epilogue unwind info is used, even if no debug info is available.

require is_x86_64_m64_target

set srcfile_flags {}
lappend srcfile_flags debug
lappend srcfile_flags nopie

set srcfile2_flags {}
lappend srcfile2_flags nodebug
lappend srcfile_flags nopie

set ldflags $srcfile_flags

if [info exists COMPILE] {
    # Make sure that we use .eh_frame info, by generating it
    # using -fasynchronous-unwind-tables.
    if { [gdb_can_simple_compile fasynchronous-unwind-tables \
	      { void foo () { } } object -fasynchronous-unwind-tables] } {
	lappend srcfile2_flags additional_flags=-fasynchronous-unwind-tables
    } else {
	unsupported "required: .eh_frame"
	return
    }
    standard_testfile unwind-on-each-insn.c unwind-on-each-insn-foo.c
    # When updating the .s file, use these flags to generate the file:
    #lappend srcfile2_flags additional_flags=-save-temps
    #lappend srcfile2_flags additional_flags=-dA
    # and do the following:
    # - copy it in place, run the test-case and verify that all tests pass.
    # - confuse the amd64 epilogue unwinder by inserting the following
    #   in foo:
    #          nop
    #     +    pushq $.L1
    #     +    ret
    #     +  .L1:
    #     +    nop
    #          popq %rbp
    # - verify that the test-case passes.
} else {
    standard_testfile unwind-on-each-insn.c .s
}

source $srcdir/$subdir/unwind-on-each-insn.exp.tcl